code: def identity(label: TensorLike) -> tf.Tensor:
      """Identity function that returns the input label.
  
      Args:
        label: A `Tensor` or anything that can be converted to a tensor using
          `tf.convert_to_tensor`.
  
      Returns:
        The input label.
      """
      return label
  
file_path: ranking/tensorflow_ranking/python/keras/utils.py
imports: from typing import Callable
  import tensorflow
label_desc: Use image node_id 3 for calling a global function with example usage: identity(label) and returns: label